* {
    margin: 0;
    padding: 0;
}

body {
    background-color: #F0F0F0;
}

.slider {
    width: 640px;
    position: relative;
    padding-top: 350px;
    margin: 20px auto 100px auto;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.75);
}

.slider {
    position: relative;
    top: 350px;
    left: 400px;
}

.slider>img {
    position: absolute;
    left: 0;
    top: 0;
    transition: all 0.5s;
}

.slider input[name='slide_switch'] {
    display: none;
}

.slider label {
    margin: 18px 0 0 18px;
    float: left;
    cursor: pointer;
    transition: all 0.5s;
    opacity: 0.6;
}

.slider label img {
    display: block;
}

.slider input[name='slide_switch']:checked+label {
    border-color: #666;
    opacity: 1;
}

.slider input[name='slide_switch']~img {
    opacity: 0;
    transform: scale(1.1);
}

.slider input[name='slide_switch']:checked+label+img {
    opacity: 1;
    transform: scale(1);
}

.yua {
    width: 30px;
    height: 30px;
    border-radius: 15px;
    background-color: rgba(255, 255, 255, 0.897);
}